feat: Implement Intelligent Plugin Conflict Detector WordPress plugin #3835

Originally written by @Copilot on GitHub.
Imported from https://github.com/ccantynz-alt/Intelligent-Plugin-Conflict-Detector/pull/1

WooCommerce store owners waste hours manually deactivating plugins one-by-one after updates break their sites. This plugin provides automated background conflict detection, safe snapshot-based state management, and one-click rollback.

Architecture

Core classes (includes/)

• IPCD_Plugin_State_Manager — captures/restores active plugin list snapshots to a custom DB table; auto-triggered on every plugin activate/update
• IPCD_Conflict_Detector — records conflicts (HTTP 5xx probes + PHP error log scan) with three severity levels; stores up to 200 records in a WP option
• IPCD_Background_Tester — WP-Cron queue processor; fires immediately on plugin change and on a configurable interval (default 6h); each run probes home URL + admin health endpoint
• IPCD_Rollback_Manager — restores any snapshot with a pre-rollback safety snapshot auto-created first, making every rollback itself reversible
• IPCD_Notification_Manager — admin notice queue + optional email alerts on conflict detection

Admin UI (admin/)

• Tabbed dashboard: active conflicts with per-row Resolve, snapshot table with per-row Rollback/Delete, rollback audit history
• Settings: email alerts, auto-rollback on critical conflicts, scan interval
• Plugins screen integration: injects a red "N Conflicts" action link on any plugin with active conflicts
• All interactions are AJAX with optimistic UI updates (no full-page reloads)

Hooks for extensibility

// React to a newly recorded conflict
add_action( 'ipcd_conflict_recorded', function( array $conflict, string $id ) { ... }, 10, 2 );

// React after a successful rollback
add_action( 'ipcd_rollback_complete', function( string $snapshot_id, string $pre_rollback_id ) { ... }, 10, 2 );

Tests

21 PHPUnit unit tests across all four core classes using Brain\Monkey to mock WP functions — no live WordPress installation required.

[!WARNING]

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/Brain-WP/BrainMonkey/zipball/ea3aeb3d559ba3c0930b3f4d210b665a4c044d83
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• https://api.github.com/repos/hamcrest/hamcrest-php/zipball/f8b1c0173b22fa6ec77a81fe63e5b01eba7e6487
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• https://api.github.com/repos/sebastianbergmann/version/zipball/c6c1022351a901512170118436c764e473f6de8c
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If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)